Material



July 10, 1928.

1,677,073 G. COHEN BUILDING MATERIAL Filed Sept. 10. 1926 i INVENTOR SSES KWITNE GEOHGECOHEA/ J.

j wmw BY QM ATTORNEYS Patented silly "I0, 1928.

GEORGE COHEN, or NEW YORK, N. Y.

BUILDING MATERIAL.

Application filed September 10, 1926. Serial No. 134,710.

The present invention is concerned with the provision of a building material adapted to be made up either as a wall board or as a metal lath.

An objectof the invention is to provide a material of this character which will be light in weight, easy to handle, fire-proof, and rugged and durable in use.

Another object of the invention is to provide a -material of this character so .constructed that plaster applied to one face thereof will be actually keyed to the material so that there will be no danger of the plaster cracking or dropping. v

Still another object of the invention is to provide a materialof this class whichlends itself readily to the application of hcat-insulating material.

A further object ofthe invention is to provide a metal wall board so constructed that when it isnailed inplace the nail heads will be sunk belowthesurface of the board and will be entirely onccaled after a coat of paint has been applied. All'typ'es of wall board new on the market which involve the use of nails as securing means, are subjectto the'common disadvantage of exposi g the nail heads" when m place. Fifty per cent saving (itplaster \Vlll be obtained witlijthe use of the device'and in; ferior pl aster?willbe prevented vfrom taliing down. j I T y f With the above" notcdand' other objects'in view, the invention consists in" certain novel features ofi construction combinations and arrangements of parts, as will be more fully hereiifft'er set forth and Pointed .out i i The invention maybe more od'from the following diP' c ion with; the accompanying drawingspwhereinj Figure l is 'a fragmentary perspective view showing a. small section of a-metal wall,

board embodying the invention;

Fig 2 is a fragmentary perspective view showing the three metallic laminations which constitute the board, disassembled;

"Fig. 3is a view similarto Fig. 2 but IlllIS- trating a modification. Fig. 4 is a similar view illustrating a further modification.

Referring first to Figs. 1 and 2 of the drawings, it will be noted that the wall board of the present invention is built up of three laminations of relatively thui ga metal; the inner lamination 10 is in te to the sheet 10 and the'sheet 11.

nature of a flat unapertured sheet ofmetal.

capable of being readily pierced by a nail.

The outer lamination consists of a similar metallic sheet 11 having apertures 12 there- 'in of greater'diamcter than the heads ofjthe nails with which the board is. to he secur0d.;.;

The intermediate lamination comprises a sheet of corrugated metal 13 having the ridges of its corrugations securedalternately Theg.man-

nor of securing the sheet 13 to the inner and outer sheets is subject to considerable varia tion, but I prefer to spot-weld or use any other well-known weldingprocess to unite the. sheets. Y

It. will be noted that apertures 12 the., v

sl'met 11 are arranged immediately above the bottom of grooves in the sheet 13, so that nails 14 driven through the openings 12" to secure the wall board. against studdi-ng or other suitable supports, will pass through the openings and be stoppedby the confronting walls of the bottom of the groovednthe plate .13. It willbe noted in the illustrated embodiment of ftheinvention that the corrugatlons are somewhat irregular providing relatively. eapacious grooves or. pockets facing the rear plate and'relatively restricted grooves or pockets facing the forward plate to be accommodated between the plates-10 and 13, and also to economize;on thepaint or nlastie 16 .which fills the space between the'plat fll and the plate 13..

17. Thepurpose otthis is to per m-itarelatlvely large amount ofinsulating material. 15

. The insulating 'material may ofany 1 flows through the 0penings12 interlocking around the nail heads and-in the-openings and. effectively concealing the heads of' the nails as well as presenting a smooth finished exposed surface to the board.

In Fig. 3 Ih-ave illustrated a modification of the invention in which the board consists of three metallic laminations 20. 21 and'22, the inner lamination 20 being in the nature of a metal sheet similar to the sheet 10.

The intermediate lamination 2t comprises a corrugated metal sheet and the outer ,lamia nation 22 comprises an ordinary wire screen, preferably of about 4-inch mesh. "These three laminations are secured together by welding or in any other convenient manner,

and insulating material or paint or mastic may be applied as above described. Attention is called to the peculiar cross-sectional is also very effective when the buildin mate-- I rial is made'up in the form of a lath instead of a wall board. The plaster when applied to such a lath will not only be keyed to the member 21 but will completely embed the screen 22 so that the danger of the plaster falling or cracking is practicallymil.

The lamination 21 of Fig; 3'may if desired be provided with apertures 23 in the portion which lies against the wire screen. I

In Fig. 4 I have illustrated a modification in the form of a plate adapted to be substituted for the plate 12 or the screen 22. It will be noted that the plate 30 is shouldered at 31and apertured at 32. The plate is adapted when covered with paint or plaster,' to simulate an'ordinary clapboard for- -mation, the shoulders giving the appearance of' overlapping clapboards. This form of the device is of course primarily intended for use in constructions where the plate 30 will be presented at the exterior of the building.

Obviously various changes and alterations might be made in the general form and arrangement of parts described'without de- 'partingrfrom the invention." Hence I .do

not wish to limit myself to the details set forth but 'shall consider myself atliberty to make such changes. and alterations as fairly fall within the spirit and scope of the ap nded claims.

$hat is claimed is:

1. A'building material adaptedto be made up in plate or lath stock, including only three overlying connected metallic laminations, the intermediate lamination being -cor-.

rugated andthe outer laminations being approximately flat, one of said outer laminations comprising a -wire'- screen through which plaster ma be forced into the grooves of the corru te lamination.

2. A building material adapted to be made 'raminous sheet.

tiois comprising a corrugated an get-her, the corru ated sheet comprising a1 up in plate or lath stock, including three overlying connected metallic laminations, the intermediate lamination being corrugated and the outer laminations being approximately flat and one of .them being reticulated, said corrugated lamination being shaped to provide alternating undercut keys and keyways in which plaster is adapted to lock.

p 3. A building material adaptedto be made up in plate 'or-lath stock, Including three overlying connected metallic laminations,

the intermediatelamination being... corrugated and the outer laminations being approximately flat, one of said outer laminations bein foraminous, the corrugationsin thecentra laminations being arranged to provide relatively restricted grooves betweensaid laminations and the foraminous sheet and relatively capacious grooves. ...between said central lamination and the other sheet.

4. A device as set forth inclaim 3, wherein nails are ada ted to be driven through the holes in one s eet and 'a filler in the restricted grooves embeds and conceals the nail heads.

5. A device asset forth in claim 3 wherealternate undercut grooves and ribs adapted material fills the capato serveas keyanchorages for. plaster forced through the foraminous ply. r v

7. An all-metal lath for uilding constructions comprising acorrugated sheet of metal and a foraminous sheet of metal. secured together, the corrugated sheet comprising alternate undercut keys and keyways for the reception of plaster forced through the fo 8. An all-metal lath for building construcsheet of metal a foraminous sheet of metal secured to} ternate undercut eys-and'keyways -for the reception of plaster forced through the faramlnous sheet, the keys bein'g-also foraminous to interlock with the plaster.

GEORGE (JOHEN. 

